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UNITED STATES PATENT GEEICE.

CHARLES E. RoYLE, oE NEW YORK, N. Y., ASsiGNoR To THE EoYLE ILLU- MiNATiNe COMPANY, 0E SAME PLAGE.

SPECIFICATION forming part of Letters Patent No. 295,479, dated March 18,1884. f Application led August 25, 1882. Renewed August 23, 1883. (No model.)

To @ZZ whom it may concern: i

Beit known that I, CHARLES B. BoYLE, a citizen of the United States, residing in the city of New York, in the county of New York and State of New York, have invented a new and useful Improvement in Lamps for Burning Mineral and other Oils, (for which I have not yet applied for a patent in any foreign country,) of which the following is a specification. y

My invention relates to improvements in vase-lamps in which thetank or reservoir holding the oil has a perpendicular central drafttube surroundedby a draft-chamber,both communicating with the air through the bottom of the oil-tank, from whence all the air which supplies the iame with oxygen is drawn. The porcelain or other vase, in the top of which the oil-tank is placed, is pierced in its bottom or near its base with a sufficient number of small openings to admit all the air required for the supply of the flame, and sufficient in excess to keep 'a constant air-current flowing upward between the oil-tank and the vase and passing out through orifices in the top of the latter. I attain these results by the construction shown in the accompanying drawings.

Figure l of the drawings herewith submitted is a full-sized vertical central section of a round-wick lamp now in use. Fig. 2 is a vertical section of my removable burner detached.

Ais the oil-tank; B B, the annular air-chamwber; C C, an annular oil-chamber, down into which the wick extends from the burner, and D is the central air-chamber.

The bent arrows FFindicate the flow of the oil through the horizontal tubes E E from the tank A A into the wick-chamber C C. y

The bottom of the wick-chamber is closed, like that of the tank. i

The walls and bottom of the vase are indicated by the letter V.

The openings g g show two of a system of perforations which pass through the bottom ofthe vase for the purpose of admitting air, and the system of arrowed and dotted lines shows the entrance of the air and its distribution after entering the vase, one portion passing up to the iiame through the central tube,

D, and the annular chamber BB, and another portion, H H, passing upward between the interior wall of the vase and the exterior wall of the tank, and making its exit through notches or perforations J in the top of the vase, as shown by the arrows.

The height of the tubes which inclose the wick-chamber C C is indicated by the arrows K K, the inner tube being a little the higher, in order to facilitate the entrance of the wick and wick-tube of the burner while it is being screwed to its place.

The tube which forms the exterior wall of the air-chamberB B has its upper termination against the top of the oil-tank, to which it is soldered at L L. i

The tubes which form thevwalls of the annular air-chamber B B are held in their place at the bottom by the cross-tubes EE andat the top by thin checks M M. The continuation of the air-chamber B B through the burner has its walls held together and concentric by similar` checks, while the interior tube of the burner is held concentrically by a substantial connection of reasonably thick sheet metal, N,which is firmly setinto the walls of the wick-chamber and soldered to them. The edges of the wick pass down on either side of this connection.

The projections O O show the cross-sections of a ring on the outside of the burner, forming a lrest for the chimney, which comes down far enough to require no outside holder.

The burner screws onto the lamp, as shown at S.

The wick is raised. and lowered by the ordinary mechanical means now so commonly in USB.

P is an opening for filling the lamp, R a

cup for receiving any oil which may drop from the center tubes, and T a bolt which fastens the vase to its pedestal.

I am aware that central draft-tubes through the body of lamps, similar to that represented at D, have been used in connection with surrounding annular wick and air passages, and also that it is not new to cause a circulation of air between the oil-reservoir and its containing-vase; but Iam not aware that these several devices have been combined in the manner I have herein described; nor am I aware that a burner having tubes forming supplemental or extension draft-passages has been IOO before used in combination with a centraldraft lamp.

What I claim, therefore, as newin the abovedeseribed invention is- 1. In combination with the vase V, having apertures g in its base, and eXits J at top, the lamp-reservoir A, having a iiange at top, to adapt it to hang on the edge of the vase and permit the circulation of air freely around the font and through the exits J, as and for the purpose set forth.

2. In combination With the vase V, having perforated base, and exits J at top, the oilreservoir A, hung Within said vase, so as to leave a free air-space, H, and central and an- 

